HeartrateResource.h

00001 /**
00002  * @file    HeartrateResource.h
00003  * @brief   mbed CoAP Endpoint Heartrate resource (Grove Earbud) supporting CoAP GET and PUT
00004  * @author  Doug Anson
00005  * @version 1.0
00006  * @see
00007  *
00008  * Copyright (c) 2014
00009  *
00010  * Licensed under the Apache License, Version 2.0 (the "License");
00011  * you may not use this file except in compliance with the License.
00012  * You may obtain a copy of the License at
00013  *
00014  *     http://www.apache.org/licenses/LICENSE-2.0
00015  *
00016  * Unless required by applicable law or agreed to in writing, software
00017  * distributed under the License is distributed on an "AS IS" BASIS,
00018  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00019  * See the License for the specific language governing permissions and
00020  * limitations under the License.
00021  */
00022 
00023 #ifndef __HEARTRATE_RESOURCE_H__
00024 #define __HEARTRATE_RESOURCE_H__
00025 
00026 // Base class
00027 #include "DynamicResource.h"
00028 
00029 // which Nordic board?
00030 #ifdef TARGET_NRF51_DK
00031     #define ENDPOINT_INTERRUPT_PIN P0_14
00032 #endif
00033 #ifdef TARGET_NRF51_DONGLE
00034     #define ENDPOINT_INTERRUPT_PIN P0_15
00035 #endif
00036 #ifdef TARGET_NRF51_MKIT
00037     #define ENDPOINT_INTERRUPT_PIN P0
00038 #endif
00039 #ifdef TARGET_K64F
00040     #define ENDPOINT_INTERRUPT_PIN D2
00041 #endif
00042 
00043 // Grove Earbud Sensor
00044 #include "GroveEarbudSensor.h"
00045 //extern RawSerial pc;                                    // declared in main.cpp for logger... just reference here...     
00046 GroveEarbudSensor __earbud(ENDPOINT_INTERRUPT_PIN,&pc);
00047 
00048 // HRM sensor value
00049 static char __hrm[10];
00050 
00051 // forward declaration
00052 extern void __hrm_callback(float value,void *instance);
00053 
00054 /** HeartrateResource class
00055  */
00056 class HeartrateResource : public DynamicResource
00057 {
00058 
00059 public:
00060     /**
00061     Default constructor
00062     @param logger input logger instance for this resource
00063     @param name input the Light resource name
00064     @param observable input the resource is Observable (default: FALSE)
00065     */
00066     HeartrateResource(const Logger *logger,const char *name,const bool observable = false) : DynamicResource(logger,name,"Heartrate",SN_GRS_GET_ALLOWED,observable) {
00067         // init...
00068         memset(__hrm,0,10);
00069         sprintf(__hrm,"0.0");
00070         
00071         // finish setup of the earbud sensor
00072         __earbud.registerCallback(&__hrm_callback,this);
00073         
00074         // this resource implements its own observation handler...
00075         this->m_implements_observation = true;
00076     }
00077 
00078     /**
00079     Get the value of the Heartrate sensor
00080     @returns string containing the heartrate in bpm
00081     */
00082     virtual string get() {
00083        return string(__hrm);
00084     }
00085 };
00086 
00087 // Heartrate callback (Earbud)
00088 void __hrm_callback(float heartrate,void *data) {
00089     memset(__hrm,0,10);
00090     sprintf(__hrm,"%.1f",heartrate);
00091     
00092     // observation handler implementation
00093     if (data != NULL) {
00094         HeartrateResource *res = (HeartrateResource *)data;
00095         if (res->isObservable()) {
00096             res->observe();
00097         }
00098     }
00099 }
00100 
00101 #endif // __HEARTRATE_RESOURCE_H__